/*
 * Copyright (C) 2007, 2015 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "content/ui/WebDropSource.h"
#include <Windows.h>

namespace content {

HRESULT WebDropSource::createInstance(IDropSource** result)
{
    if (!result)
        return E_INVALIDARG;
    *result = new WebDropSource();
    return S_OK;
}

WebDropSource::WebDropSource()
{
//     gClassCount++;
//     gClassNameCount().add("WebDropSource");
}

WebDropSource::~WebDropSource()
{
//     gClassCount--;
//     gClassNameCount().remove("WebDropSource");
}

HRESULT WebDropSource::QueryInterface(REFIID riid, void** ppvObject)
{
    if (!ppvObject)
        return E_POINTER;
    *ppvObject = nullptr;
    if (IsEqualIID(riid, IID_IUnknown) || 
        IsEqualIID(riid, IID_IDropSource)) {
        *ppvObject = this;
        AddRef();

        return S_OK;
    }

    return E_NOINTERFACE;
}

ULONG WebDropSource::AddRef()
{
    return InterlockedIncrement(&m_ref);
}

ULONG WebDropSource::Release()
{
    long c = InterlockedDecrement(&m_ref);
    if (c == 0)
        delete this;
    return c;
}

// PlatformMouseEvent generateMouseEvent(WebView* webView, bool isDrag)
// {
//     POINTL pt;
//     ::GetCursorPos((LPPOINT)&pt);
//     POINTL localpt = pt;
//     HWND viewWindow;
//     if (SUCCEEDED(webView->viewWindow(&viewWindow)))
//         ::ScreenToClient(viewWindow, reinterpret_cast<LPPOINT>(&localpt));
//     return PlatformMouseEvent(IntPoint(localpt.x, localpt.y), IntPoint(pt.x, pt.y),
//         isDrag ? LeftButton : NoButton, PlatformEvent::MouseMoved, 0, false, false, false, false, currentTime(), 0);
// }

STDMETHODIMP WebDropSource::QueryContinueDrag(_In_ BOOL fEscapePressed, _In_ DWORD grfKeyState)
{
    if (fEscapePressed || !(grfKeyState & (MK_LBUTTON|MK_RBUTTON))) {
        m_dropped = !fEscapePressed;
        return fEscapePressed? DRAGDROP_S_CANCEL : DRAGDROP_S_DROP;
    }

    return S_OK;
}

STDMETHODIMP WebDropSource::GiveFeedback(_In_ DWORD dwEffect)
{
    return DRAGDROP_S_USEDEFAULTCURSORS;

//     BOOL showCustomCursors;
//     if (FAILED(WebPreferences::sharedStandardPreferences()->customDragCursorsEnabled(&showCustomCursors)))
//         return DRAGDROP_S_USEDEFAULTCURSORS;
// 
//     // If we don't want to hide the stop icon, let Windows select the cursor.
//     if (!showCustomCursors)
//         return DRAGDROP_S_USEDEFAULTCURSORS;
// 
//     // If we are going to show something other than the not allowed arrow, then let Windows
//     // show the cursor.
//     if (dwEffect != DROPEFFECT_NONE)
//         return DRAGDROP_S_USEDEFAULTCURSORS;
//     
//     HWND viewWindow;
//     if (FAILED(m_webView->viewWindow(&viewWindow)))
//         return DRAGDROP_S_USEDEFAULTCURSORS;
// 
//     RECT webViewRect;
//     GetWindowRect(viewWindow, &webViewRect);
// 
//     POINT cursorPoint;
//     GetCursorPos(&cursorPoint);
// 
//     if (!PtInRect(&webViewRect, cursorPoint)) {
//         // If our cursor is outside the bounds of the webView, we want to let Windows select the cursor.
//         return DRAGDROP_S_USEDEFAULTCURSORS;
//     }
// 
//     FrameView* view = m_webView->page()->mainFrame().view();
//     if (!view)
//         return DRAGDROP_S_USEDEFAULTCURSORS;
// 
//     // When dragging inside a WebView and the drag is not allowed, don't show the not allowed icon,
//     // instead, show the pointer cursor.   
//     // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer).
//     view->setCursor(pointerCursor()); 
//     return S_OK;
}

}